I owned a few Naish kites in the past (still selling 07 Raven 14m2 and 08 Alliance 10 m2).The only issue I had, when crashing the kite hard (I pumped it to the max, especially sigmas), was some internal leakage. I mean when I deflated the main tube some struts also deflated (this can also be due to some sand blockig the valve, preventing it from complete closing). I fixed it by simply reassembling the conection. Sure it is hard the first time due to a small opening and blind operation, but once you are aware how the parts are assembled, you have no problem doing it blind. Naish also suggest applying a couple of threads of plumbing tape on the male part of the valve, but it worked for me withou it.Naish's user manual instructs you through this procedure very clearly, although I admit I was avoiding this until I had a friend assisting me for the first time, I still had to do it blind, but it helped me loosing fear from repairing it. Such a silly concern